Combined cylinder-head



T. D. LEMIEUX.

COMBINED CYLINDER HEAD- APPLICATION men AUG-6,1919.

11,343,678. Patented June 15,1920.

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UNITED ,STATES ra'rsnr orrlce.

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COMBINED .GYLINDER HEAD.

To all whom it mag/concern.

Be it known that I, THOMAS D. Lnzvirnnx, a citizen of the United States,-=-residingat Lakewood, in the county of Cuyahoga and State of Ohio, have invented certainnew and useful Improvements in Combined Cylinder-Heads, of which the following is a specification.

This invention is an improvement in or upon my Patent No. 1,091,359, of March 2%, 1914, by which a small percentage of the explosive gases is introduced behind the lower packing ring on the fixed head in an expanding relation to the sleeve valve, so as to effectually deaden the noise otherwise occurring in the operation of such valves in connection with the cylinder head, and to compensate for wear in the packing ring, the means herein providing diiferent avenues of approach to said space, as shown and described and fully pointed out in the claims.

In the accompanying drawings, Figure 1 .is a vertical sectional elevation through the cylinder head and a portion of the sleeve valve therewith at the end of its stroke, and Fig. 2 is a cross section of the cylinder head alone on line -2-2 Fig. 1, except that the valve is omitted and the head is sectioned so as to disclose the flange about the same in plan and the improved channels thereon.

The fixed cylinder head it and the reciprocating sleeve valve o as shown are well known related elements or parts used 1n explosive engines of a certain type, as are also the two packing rings 2 and 3 thereon with the annular rib a between said rings and the bottom flange or rim 5, which confines the lower and larger of said rings, and it is in connection with this flange and the lower packing ring that my inventlon appears.

In the above recited patent I employ a series of ports or channels which represent bores or inlets for gas extending at an upward and outward inclination through the bottom extension of the head hfand tapped into the annular seat for the lower packing ring at the base of the said flange, but I have found by experience that I can get equally satisfactory results by taklng advantage of the loose or free working relation necessary between the edge of flange 5 and the valve 2) and where gas unavoidably enters in any event, and diverting the gas to the rear of said ring from this space by means of a multiplied'series of channels "specifieatioiiof Letters Patent. Patented he 1920 Application filed August 6, 1919. Serial No. 315,617.

which will conduct the gas therefrom to the rear of or behind the packing ring. The said channels or ducts are therefore preferably in groups of three and V-shape in cross section for reasons hereafter stated, and as seen in Fig. 1, and which have a terminal or common delivery point for each group at the inner periphery of said flange at a. The said supply ducts or channels Z), c and (Z, thus constitute three straight lines running to the same delivery point in suitably spaced relations to the edge of flange 5, and said ducts c and cl are such a tangent to the periphery of the flange 5 as to open at their inner sides .for a short distance againstthe base thereof and hence'to the space behind the packing ring 3, while the duct 6 at right angles thereto intersects said lateral ducts at the junction 0: and in free delivery thereto. This arrangement and comparative multiplicity of the said ducts insures instant responsiveness and uniformity of gas pressure behind the said ring and effectually'subdues all noise in the operation of thervalve.

It will also be observed that the formation of the said ducts in the manner herein shown and described has the material advantage of making the improvement avail able in valve mechanisms of this kind which are not equipped with these or equivalent means because the ducts herein set forth can be produced by means of a small triangular file at home by the owner of the car and without taking the car to a machine shop or other place for the purpose and as would be necessary to provide the cylinder head with the form shown in my aforesaid patent. It is a good plan to break off the immediate point of the file for this use. Of course by reason of a comparatively large number of converging ducts or channels as shown in their relation to the parts they may be quite shallow or slight and serve the purpose, and hence to provide a cylinder head with this improvement does not involve either much labor or time to do the work.

Of course in the manufacture of the head with the ducts or channels shown, any conthe said ducts or channels, and the ducts 0 and (Z especially, since they run in a straight line, can be cut by a suitably shaped rotary or other tool.

What I claim is:

1. fixed cylinder head having a dependvenient means may be employed to produce ing portion With a flange about its bottom and a packing ring about the same resting on said flange, and the said flange provided with V-shaped channels in its top at intervals about the same terminating at the base 7 of said flange in such relation to said ring as to conduct a fluid under pressure behindin its topcomprising three ducts in each group leading to a common point of discharge at the base of saidflange;

3. A combined cylinder head and reciproeating valve, and said head having a packing' ring about the same and a flange beneath saidring provided With groups of straight channels of V-shape in its top and all the channelsin eachfgroup having commonterminals at the base of said flange,

Signed at Cleveland, in the county of CuyahOga and State of Ohio, this 8th day of July, 1919; r

THOMAS 1). LEMIEUX. 

